Association between Perinatal Outcomes and Maternal Risk Factors: A Cohort Study oleh Raquel Martin-Alonso, Paula Prieto, Irene Fernández-Buhigas, Cristina German-Fernandez, Cristina Aramburu, Victor Piqueras, Diana Cuenca-Gomez, Emilia Ferrer, Valeria Rolle, Belén Santacruz, María M. Gil